Boiler



April 6 1926. f 1,580,063

J. M MCCLELLON BOILER i originali Filed :June s. 191e 3 sheets-shef'v 1 u; Q y Inventor:

` JameeMjIct'llol/a.

April e 192e. 1,580,063

J.M.MCCLELLON BOILER Original Filed June 5, 1916 3 Sheets-Sheet 2 Paemtea Apr. 6,1926.r

JAMES? M.;

Be it known' that 'LJAMESML a citizen of the?UnitedSt'attes,i anda r'esi'dfentfl of Everett, county-v of Middlesex', `and RCgml' monwealt'h.y or"Massaehusettsfhaveiinvented following` description;r in` connection ireebox 'and'fcombustion' chamber1'conV'stri'icl- The boiler shown' herein isVV animprove'- ment upon the application ,Y SerialA 'No." 86;,8'157, filed Mlrchif 27,1916;

The charaoter'oftheinventibnfmay be bestfv understood by reference' to therfollowing;'de-`y f scription ofan embodiment'oijthe"invention;

` shownI in -A Fig. is

and Vpartly in vertical, longitudinal `Sectio-i1" the,accompanyingfdrawings,Where-` 1n,- Y

a v1eWi partly' V1n side; elevation of La boiler shown herein yas'embodying the. invention;

rig. 2 is a*vertical,1transverse@mammelleV Fig. "3, is a 'horizontal 'section taken 'oril line. 3'-3ofFig;Q/;Land

the superheatingytubes (notV shownjfare coniy nected tothe "flue sheet and `extend forwardly inthe barreltherefrom.'v

To [forni the crown 'of the` irebox" and combustionchamber, side drums 9 (Figsl andv 2)"and5 a larger; 4interme'diate drunr'fll Y are providedpreferably eXt'endiiigQthe-length.

of' the r reebox" 'andi'icombustion;ichamber.

The forward endsl of the'f side drumsf 9 are overlapped by andl rivetedto' sideportions lBiCgF'ig: 1)'fof the barrel; atop sectionfo-tlie' latter 'above' said portions being; removed: Thefforwvardf ends .of said-drums are open for communication Wit1i-` said? barrel andf are formed to tit the segment Shaped openingfber one shown in" myL (1o-pending.'

ventioncomprises laA 'barrel'v 1f 2,);` y

i i twveen: the upperedge of sheet 1th@ Curved` 11p-per Wall of the barrelfand" are riveted"I to;.':s'aid flue sheet andbarreli 'The rearfendszfofjsaid drums'may be closedby bumped Iheads 15 `provided `With"[suitable manholesandcovers therefor. Y f l McCLELLoN;ormvnnmig;imssAoHusE'r'rs;. HAROLD; y1a. Mcomin-1:01a;Mrf rmmsrnnmomorffsermumnsm. 'ueomnromfnncnmsnnl t' the 'bottom of heire-boxV isa fountda-e.

tion chamber Y17V'v preerably.v tubularjinifornni` rectangularjin section', and' extending-along V- .l

1, thesides and"y rear end ofthe fire-box.v

E To form' the sides'ofthe reebo'x, "seriesfofv tubes`-19 are provided" Vextending 'between' the foundationL chamber *andi the' Vside"crown.

' drumsvan'd preferablyarei curved inward ad jacenttlielatterasvshown'inFig," 2. Y

important feature, of the.' invention" relates to theVv connection :ofl said tubes r with. said foundation chamber and' drums. To accomplish this the tubes' maybe divided ini- Yto groups twotubeszbeingshovvnherein in each group, although the number maygbe varied asrequired. A Each' group ispr'ovi 1ded. 4

atQLits-upper end witha headerilj (Fifg'sQland 4") elongated and'n'preirably'f offre'ctan l gular form; The upp'er'e'rrd portions oftheI tubes v`majvrbe', squaredftoit said header and cured thereto; The squared" en'd'qol the tubes vfit together like-blocks and provide Va' sectibnz 'or assembled'andiveldedl'togetherto forml pressedftherefrom' and adapted'- toibe'exp and-V ed'into'apertures 27? said? drums* Each VYgroup may have the'flower "endsof lar tothe Vupper,header QIdesQribedi; The' lower headers rmay have necks Bjexpanded. 1

Widelyjspaced apertures 325m' 'the upper chamber andprovide communication therebetween. This enables the apertures in said drum and chamber respectively, to be widely spaced as well shown in Fig. 1, leaving a substantial amount of material between the apertures. This has important advantages, since it enables the drum walls to be of uniform thickness throughout, and the foundation chamber walls to be of uniform thick.- ness throughout, without the necessity of providing eXtra thickness or reinforcement in the portions thereof surrounding `said apertures. Also the connection of the tubes with the drum and chamber may be easily, and readily made since merely a small nunr ber of apertures are necessary therein and a small number of necks are required for connection with said apertures. The headers may be readily applied to the tubes beforel they are assembled with the drums and chamber, thereby permitting the connection to be conveniently and readily effected.

At the rear end of the fire-box a tubular wall 35 (Fig. 1) may be provided similar to the one shown in my said co-pending application, and therefore need not be described in detail herein.

Referring now to the combustion chamber, as stated, the crown thereof may be formed by the drums 9 and 11. The side walls thereof are formed by series of tubes 37 having their upper ends connected to and communicating with the side crown drums 9 through headers 38 similar to those described for the tubes 19. These tubes are closely assembled substantially to fill the space between the flue sheet and the rear end of the barrel and may be curved to conform .to the contour ofthe barrel. The lower ends of said tubes terminate adjacent the bottom of the barrel and may be formed to fit and be welded into headers 39 having necks 40 (Fig. 1) depending therefrom and expanded into apertures 40a in the bottom wall of said barrel. The ends of the headers opposite the ends of the tubes may have plugs 41 threaded therein which may be readily removed to furnish access to the endsof said tubes for convenience in assembly, repair and cleaning thereof. Tiles 42 may be placed upon the headers to protect them from the high heats of the gases of combustion from the fire on the grate. A

To supply water from the barrel to the bottom headers, a plate 43 (Fig. 3) may be provided formed to provide an ample chamber beneath the combustion chamber. This chamber may be T-shaped with an end 45 beneath the barrel directly in front of the flue sheet and communicating with said barrel through a series of elongated apertures 47 therein. The plate 43 has a ange 43a surrounding the same which may be rivetedv directly to the barrel, thus eliminating the *necessity for a separate top Wall for theY water supply chamber, andproviding a simple, compact construction enabling water to 'pass freely from the barrel to the headers and thence up through the tubes 37 .Y The plate 43 may have vertical stays 49 (Figs. 1

and 3) connecting the same with the bottom` into the barrel and riveted thereto to protect the edge of said barrel. The forward ends of the side legs of the foundation chamber may be connected to the plate 51 by collars 57 pressed from said plate and riveted to said chamber. The lower ends of said platesV may be connected to an intermediate foundation member 61 and they may be strengthened by stays 63 connected thereto. Tie-rods 60 may connect the plate 51 with the forward end of the water supply chamber.

Water may freely flow from the barrel through the water supply chamber down through the space between the plates 51 and 53 into the foundation chamber, and rise thence through the side and end wall tubes to the crown chamber.

Elbow pipes G4 (Fig. 2) may allow fluid to escape upward from the space-between the plates 51 and 53 to certain of the combustion chamber tubes. v

Arch tubes 65 (Fig. l) may extend from the plate 51 rearwardly and upwardly to the crown drums and support a tile wall 67 for baffling the gases of combustion in their transit from the grate (not shown) to the combustion chamber. i c

By my invention'a fire-box and combustion chamber are provided having strong and simple means to connect the tubes thereof with upper and lower chambers, while permitting a free circulation of fluid there'- through.

` In the present application I have VClaimed solely the construction herein shown wherein the wall tubes are arranged in groups or panels. More generic claims covering such construction among others and claims toV other features herein disclosed are embodied It will be understood that the invention Vis not limited to the particular` embodiment shown herein, but various deviations may be made therefrom without departing from the spirit and scope of the claims.

Claims 1. In a boiler, a chamber, a tubular water containing wall comprising tubes set side by side said wall extending longitudinally of the chamber and means for placing said tubes in communication with the interior of said chamber comprising headers each communicating with said chamber and with a group of said tubes.

2. In a boiler, a chamber, a tubular water containing wall comprising tubes set side by side said wall extending longitudinally of the chamber and means for placing said tubes in communication with the interior of said chamber comprising headers having open tops each receiving the ends of a group of said vtubes and also having an opening to the interior of the chamber.

3. In aboiler, a'chamber, a tubular water containing Wall comprising tubes set side by side said wall extending longitudinally of the chamber and means for placing said tubes in communication with the interior of said chamber comprising headers having open tops eachreceiving the ends of a group of said tubes and having necks entered through the wall of said chamber, the number of tubes being several times greater than the number of such necks.

4. In a boiler, a chamber, a tubular water containing wall comprising tubes set side by side extending longitudinally of the chamber, each tube having a wall of substantially uniform thickness and being substantially circular in section, groups of said tubes having end portions joinedtogether, headers each having an open top receiving the end portions of a group of tubes and sides extending over and fitting the sides of said end portions and fusedlyl joined Y thereto, and means providing communication between the headers and the chamber.

-,5. In a boiler, in combination,y a barrel, a flue sheet therein, means exteriorvto the barrel shell and in co-operation therewith forming a water chamber extending rearwardly of the flue sheet, a combustion chamber compresing ytubes set side by side and housed within said barrel shell, headers each receiving the ends of a group of said tubes and means providing communication through saidbarrel shell between the interior of said headers and th-e interior of the chamber.

6. In a boiler, crown and bottom chambers and side walls extending between them each comprising a plurality of sections or panels, each panel comprising a plurality of laterally contacting tubes, corresponding ends of the. tubes of each panel fitting a head'- er which extends longitudinally of the chambers and a neck on said header entering the adjacent chamber. Y

7. In a boiler, crown and bottom chambers and side walls extending between them each comprising a plurality of sections or panels, each panel comprising a plurality of laterally contacting tubes, upper and lower ends of the tubes of each panel fitting respectively into` longitudinal headers and necks on said headers entering the adjacent chambers. c

In testimony whereof, I have signed my name l to this specification.

JAMES M. MCoLELLoN. 

